Carburetor



L. F. wASsoN.

CARBUREIOR.

APPLICATION FILED APR. 17, ISI?.

Patented Mar. 7, 1922.

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LOUISy F. WASSON, OF ELLENSBURG, WASHINGTON.

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tain new andvuseful Improvement in Car` buretors, of which the following is a specification.

My invention relates to improvements in carburetors. j

The objects of my invention are: to provide a carburetor whereby a sufficient volume of fuel `in the form of carbureted air shall be vsupplied to thefcylinders of the engine so that the fuel consumed shall be dependent upon and in directproportion to the power required without the loss of any ofsaid fuel; to provide a carburetor which shall produce good `atomization of the liquid fuel with the throttle ywide open as well aswhen nearly closed and to provide a Vcarburetor which conditions' ,to'achieve this result.

The above'mentionedA objects of my invention, together with others inhering in the same," are obtained by the mechanism illustrated -in the following drawings, the same being merely a preferred formof embodiment of my invention, throughout which drawings like reference numerals indicate like. parts. Y Y.

VFigure 1 is a plan view-of one form of carburetornembodying my invention; Fig. 2 is a view of the same in vertical section onbroken line 2, 2 of Fig.v 1; Fig. 3 is a \fr,agmentary,vievv ofthe same in verticall section-onbroken line 3, 3,ofFig.-2; Fig. -4

is a viewinhorizontaljsection on broken line 4,. 4` @filig- 2; and ,Fie ,5, is a View in Vertical' section on broken line 5, 5 oflFig, 4 .of a portion of` the same.

@he Objection 'to yC,arbaPeters as heretofore constructed whereintheliquid fuel is dis- Chargedinto the-.Chamber of air in the form of'a spray vconsists in .theirfailure to finely atomize, the .fuel when. the. throttle. iS ,Opened widely, Lso, thatl the" resulting Y mixture contains large globulesof raw/gasoline A entering'jt-hemanifold.. y, j ,l On theinnersideof the continuous outer wall ,1. of my'` device is secured in suitable mannera lining2 `having the functionnof wick, and upon nthevoutjer. side ofy the innery wally ,3, `concentric with tthe wallA 1 ,1is secured in4 asuitable manner a'covefringll having the function ,0f .a wick, .Similar in all inspects, t0.`

Specification of Letters Patent. Patent-,ed Ian 7 1922.

Application filed. April 17, 1917, Serial No. 162,596. i

the lining 2. The wall 3 is not continuous, but provides openings 5 and 6 upon the sides of theV wall 7 which divides the space enclosed by said wall 3 into two compartments 8 and 9, compartment 9 communicating directly with the intake manifold 10. The

wall 7 extends to the wall 1. The annular recess between the wick walls 2 and 4 is represented at 11. A little way above the bottom 12 of the annular recess 11 is the fixed floor or partition 13, which construction providesthe annular compartment 14, which compartment is supplied with liquid fuel, such as gasoline, by the pipe 15 from a float-valve controlled reservoir.

The chambers formed by the walls 1 and 3 are entirely covered by the plate 16 through which are openings 17 and 18into the 'pipe 19 through which pure air enters the carburetor, either at atmospheric temperature or in a heatedA condition fromV adjacent j heated parts of the engine. The valve 20, operated by the lever 21 secured tothe rod 22,A permits pure air to pass directly into the compartment 9. The throttle is represented as 23. ToA remove any liquid fuel which accidentally might get above the floor 13, there is provided a small drain 24.

The operation of .my carburetor is as fol-` lows: Liquid fuel, such as gasoline, enters the compartment 14 through the pipe 15, :l

said compartment being kept continuously full by a suitable valve. Extending into the liquid fuel are annular linings, such vas Wicks 2 and` 4. which are thus kept in a saturated condition theliquid risingfin the-mabove the fixed licor, 13 bya capillary attraction. Air `enters through the-pipe19, then passes through the' openingl intocthe compartment 8, thence out through the open-` ing 5 intothe annular Wick lined recess 11, wherein the moving air Abecomesnmixed or charged with the liquid fuel fromI `the .sata

urated` wick linings .by passing entirely.

thlough'and aro-und the annular recessor passageway 11; and then the mixturefof air that the air is retarded in the annular passageway or recess 1l sufhcieiitly to insure its being well' charged' orV mixed with the liquid fuel and furthermore, the redi'icing of the opening 6 as compared with opening of is for the purpose of preventing any unf due suction in the annular recess 1l; that is, so that liquid fuel is not drawn into the saidl recess. Not only is opening 6 smaller than opening 5 but it is small as compared to the mixturecarrying capacity of the recess Il. Such construction insures tlie rec-ess 1l be'- ing at all times filled with air and in this way Vthe said undue suction yiseliminated. The conto-rted coursey of the air entering the opening 17 assists in thoroughly mixing the liquid fuel and theair to provide a homo g'eiieous mixture, When a V lean explosive mixture is desired, air maybe admitted rectly into compartment 9 by opening the valve 20'.` The' best results are attained whenv the vvalve 2O is slightly open sof-that Vsome air.' at all tinies is being admitted to compart ment 9. The; valveadvantageo'usly may be opened widely after the carburetor becomes heated by the 'operation of the engine, sinee' tlie` rate` of absorption from the wicks is increased by the heated condition of thecar buretor,

Obvious-ly, changes ibe made in the Y' forms, dimensions and arrangements of the p ai'ts of my invention, the above only set ting forth a preferred. form of embodiment of my invention, withoutdeparting from the principle or the spiritfthereof.`

` I claim:y 1. A carburetor which embodies ayliquid fuel,` compartment, a mixing'passage with a wick-like lining operativelyv communicating with said fuel compartment7 a partition separating said fuel compartment from said passage, an opening for the admission of aii' to' said passage to pass along the surface of said wicliflilie liningand an outlet opening smaller than said admission opening for the direct withdrawal of the charged air from saidpassage without said air passing :through said wick-like lining, said outlet opening beingV located at the oppositev end of the mixing passage.

2. carburetor which embodies a liquid fuel compartment, an annular mixing passage with a wickllike lining operatively coininunicating with said fuelcompartment, a partition separating said fuel Vcompartment from said passage, a slot for 'the admission ofair to said passage to pass over said wick-like lining and a slot smaller than said admission slot for the direct withdrawal Vof, air from said passage without passing through said wick-like lining, said last slot beingV located at the opposite end of the mixing passage, whereby a whirling mo- Htion V,isvimparted to theair in its passage of air to said passageway, wherein said airl becomes charged with fuel, anV outlet opening practically as long as the said passagecarburetor which 'embodies a liquid way is high and narrower than said admission opening, the discharging capacity' of said outlet being relatively smallerthan the capacity of said passageway, wherebyV inter-A fering engine suctionis soV eliminated within 4said passageway thatA liquid fuel is not drawn into said passageway except by said capilla-ry action, said withdrawal vent per# mitting the charged airto passto the en!` gine cylinders.`

4e. A carburetor which vembodies a liquid-V fuel compartment, a. narrow passageway with a wick-like lining communicating with said fuel compartment by" capillary'ralstion', arpartitionA 'separating said fuel 'comparti ment from said lmixingpassage, said passageway being provided with an airv ad-` mission opening for the Vfree entry of Vair Y thereto to" the full capacity' of said passageway, wherein saidair becomes charged withv fuel by passing along the wick, said pasfk sage being further provided with an outlet opening whereby the said air charged with fuel may i be directly withdrawn `without passing through the `wick-like lining, the

discharging capacityof said VoutletV opening being relativelygsmaller then theycapacity of said passageway, whereby interfering en-4 gine suction is vso eliminated within said passa-gewaythatliquid fuel is not drawn into said recess except by said capillary action. A

5. A carburetor which embodies afliquid fuel compartment, anadmission and withdrawal chamber surrounded by a narrow passageway, the walls of'which passageway are provided with a wick-like lining, said lin ing being sodisposedwith respectto theliquid fuel compartment that it may be kept saturated with said liquid fuel but separated therefrom bya partition. said admission chamber being provided with .an opening by'which air may pass to said passageway where` it becomes charged withfuel absorbed from the said wick-like lining, and saidV withdrawal chamber being Vprovided with an opening i by which said charged air may pass from said passageway to said withdrawal chamber,

said last opening being smaller than said admission chamber opening.

6. A carburetor which embodies a liquid fuel compartment, a mixing passageway with a wick-like lining communicating with said fuel compartment by capillary action, an air admission chamber provided with an opening into said passageway, said opening functioning to admit uncharged air to said passageway to the full capacity of said passage-way and a withdrawal chamber provided with an opening into said passageway for the direct withdrawal of the charged air from said passageway without passing through the wick-like lining, both of said chambers, the admission and withdrawal, being surrounded by said passageway, the discharging capacity of said withdrawal opening being relatively smaller than the mixture carrying capacity of said passageway, whereby interfering engine suction is` so eliminated within said passageway that liquid fuel is not drawn into said passageway except by capillary action.

7. A carburetor embodying a mixing passageway formed by two concentric cylindrical wick-lined walls, i. e., an outer and an inner wall, a third wall extending diametrically across said passageway and diametrically through the center of said cylindrical walls to the inner wall, admission and withdrawal compartments bounded by said inner wall, said third wall forming a partition between said compartments, openings in said inner wall forming an admission port to and a withdrawal port from said passageway, and a liquid fuel compartment into which said wicks extend.

In witness whereof, I hereunto subscribe my name, this 9th day of April, A. D. 1917.

' LOUIS F. WASSON. 

